A nonstationary generalization of the Kerr congruenceMaking use of the Kerr theorem for shear-free null 
congruences and of Newman's representation for a
 Executive functions of preschoolers with different levels of cultural congruence the relationships between executive functions of children aged 5–6 and the level of their cultural 
congruence Some New Congruence Identities of General Partition for pr(n)In the present work, we deduce some new 
congruences modulo 3 and 5 for pr(n), where
r 2 f�����(3
 Communicative properties of the personality and cultural congruence at younger school age properties of the younger school age child identity in case of the different cultural 
congruence level
 The impact of cultural congruence on the creative thinking of primary school children of cultural 
congruence on the enhancement of creative thinking in childhood. In that regard, it would
 Communicative properties of the personality and cultural congruence at younger school age properties of the younger school age child identity in case of the different cultural 
congruence level
 A criterion for unitary congruence between matricesA criteria for unitary 
congruence between matrices is discussed. Matrices are proved
 Factors of compliance of a child with rules in a Russian cultural context rules – the cultural 
congruence. The description of the technique aimed to detect the cultural
 Effective connections and fields associated with shear-free null congruencesA special subclass of shear-free null 
congruences (SFC) is studied, with tangent vector field being
 Factors of compliance of a child with rules in a Russian cultural context rules – the cultural 
congruence. The description of the technique aimed to detect the cultural